Carbidopa-levodopa, pramipexole, ropinirole, amantadine, selegiline, and trihexyphenidyl are used to treat symptoms of Parkinsons disease. Duloxetine is used for the treatment of depression and neuropathic pain. Although depression may be associated with Parkinsons disease, it is not necessary in this patient, as there is no mention of depression in the history.